Crane Flat National Trails Surface Study

Yosemite National Park » Crane Flat National Trails Surface Study » Document List

This project is in support of the National Center on Accessibility (NCA) Trails Surface Study and proposes to evaluate up to eight commercially available, biodegradable, liquid soil stabilizers on the intermediate restroom access trail adjacent to the Crane Flat Campground restroom facility.

The study will conduct a 3-5 year evaluation on various trail surface applications where controlled testing, monitoring and research protocols can be followed that will determine if surfaces remain accessible over time. Research questions to be addressed include what surfaces are accessible, under what climactic conditions are various surface applications accessible, what are the maintenance considerations for various trail surface applications, and what is the impact of various soil characteristics,such as moisture, soil composition and how various soil applications interact positively, neutrally or negatively?
No new trails will be established as part of the project.
The application of the liquid soil stabilizer is applied by simply diluting it with water and spraying it or mixing it into loosened or compacted soil. Only the top 2-3" of trail base will be treated. Trails treatments will be 3' x 30' complete. A rototiller, a smooth drum soil compactor and a dilution tank with hose & nozzle will be used during the application effort. Applications on the materials will be accomplished by NPS staff following manufacturers instructions. Signage explaining the trails study and indicating manufacturer and material may be added in the future (if the NPS desires to highlight the study as part of the trail's recreational experience).
The Americans with Disabilities Act (ADA) of 1990 requires that new and/or altered facilities be made accessible to and usable by people with disabilities. Titles II and III of the ADA cover a wide variety of recreation facilities such as boating and fishing facilities, golf courses, parks, places of amusement, play areas, sports facilities, and trails. Newly constructed and altered recreation facilities and outdoor developed areas are required to comply with ADA Accessibility Guidelines.